| /* Copyright (C) 2004 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.awt.image; |
| |
| /** |
| * MultiPixelPackedSampleModel provides a single band model that supports |
| * multiple pixels in a single unit. Pixels have 2^n bits and 2^k pixels fit |
| * per data element. |
| * |
| * @author Jerry Quinn (jlquinn@optonline.net) |
| */ |
| public final class BandedSampleModel extends ComponentSampleModel |
| { |
| private int[] bitMasks; |
| private int[] bitOffsets; |
| private int[] sampleSize; |
| private int dataBitOffset; |
| private int elemBits; |
| private int numberOfBits; |
| private int numElems; |
| |
| public BandedSampleModel(int dataType, int w, int h, int numBands) |
| { |
| super(dataType, w, h, 1, w, new int[numBands]); |
| } |
| |
| public BandedSampleModel(int dataType, int w, int h, int scanlineStride, |
| int[] bankIndices, int[] bandOffsets) |
| { |
| super(dataType, w, h, 1, scanlineStride, bankIndices, bandOffsets); |
| } |
| |
| public SampleModel createCompatibleSampleModel(int w, int h) |
| { |
| // NOTE: blackdown 1.4.1 sets all offsets to 0. Sun's 1.4.2 docs |
| // disagree. |
| |
| // Compress offsets so minimum is 0, others w*scanlineStride |
| int[] newoffsets = new int[bandOffsets.length]; |
| int[] order = new int[bandOffsets.length]; |
| for (int i=0; i < bandOffsets.length; i++) |
| order[i] = i; |
| // FIXME: This is N^2, but not a big issue, unless there's a lot of |
| // bands... |
| for (int i=0; i < bandOffsets.length; i++) |
| for (int j=i+1; j < bandOffsets.length; i++) |
| if (bankIndices[order[i]] > bankIndices[order[j]] |
| || (bankIndices[order[i]] == bankIndices[order[j]] |
| && bandOffsets[order[i]] > bandOffsets[order[j]])) |
| { |
| int t = order[i]; order[i] = order[j]; order[j] = t; |
| } |
| int bank = 0; |
| int offset = 0; |
| for (int i=0; i < bandOffsets.length; i++) |
| { |
| if (bankIndices[order[i]] != bank) |
| { |
| bank = bankIndices[order[i]]; |
| offset = 0; |
| } |
| newoffsets[order[i]] = offset; |
| offset += w * scanlineStride; |
| } |
| |
| return new BandedSampleModel(dataType, w, h, scanlineStride, bankIndices, newoffsets); |
| } |
| |
| |
| public SampleModel createSubsetSampleModel(int[] bands) |
| { |
| int[] newoff = new int[bands.length]; |
| int[] newbanks = new int[bands.length]; |
| for (int i=0; i < bands.length; i++) |
| { |
| int b = bands[i]; |
| newoff[i] = bandOffsets[b]; |
| newbanks[i] = bankIndices[b]; |
| } |
| |
| if (bands.length > bankIndices.length) |
| throw new |
| RasterFormatException("BandedSampleModel createSubsetSampleModel too" |
| +" many bands"); |
| |
| return new BandedSampleModel(dataType, width, height, scanlineStride, |
| newbanks, newoff); |
| } |
| |
| /** |
| * Extract all samples of one pixel and return in an array of transfer type. |
| * |
| * Extracts the pixel at x, y from data and stores samples into the array |
| * obj. If obj is null, a new array of getTransferType() is created. |
| * |
| * @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>. |
| * @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>. |
| * @param obj The primitive array to store the pixels into or null to force creation. |
| * @param data The DataBuffer that is the source of the pixel data. |
| * @return The primitive array containing the pixel data. |
| * @see java.awt.image.SampleModel#getDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer) |
| */ |
| public Object getDataElements(int x, int y, Object obj, |
| DataBuffer data) |
| { |
| int pixel = getSample(x, y, 0, data); |
| switch (getTransferType()) |
| { |
| case DataBuffer.TYPE_BYTE: |
| { |
| byte[] b = (byte[])obj; |
| if (b == null) b = new byte[numBands]; |
| for (int i=0; i < numBands; i++) |
| b[i] = (byte)getSample(x, y, i, data); |
| return b; |
| } |
| case DataBuffer.TYPE_SHORT: |
| case DataBuffer.TYPE_USHORT: |
| { |
| short[] b = (short[])obj; |
| if (b == null) b = new short[numBands]; |
| for (int i=0; i < numBands; i++) |
| b[i] = (short)getSample(x, y, i, data); |
| return b; |
| } |
| case DataBuffer.TYPE_INT: |
| { |
| int[] b = (int[])obj; |
| if (b == null) b = new int[numBands]; |
| for (int i=0; i < numBands; i++) |
| b[i] = getSample(x, y, i, data); |
| return b; |
| } |
| case DataBuffer.TYPE_FLOAT: |
| { |
| float[] b = (float[])obj; |
| if (b == null) b = new float[numBands]; |
| for (int i=0; i < numBands; i++) |
| b[i] = getSampleFloat(x, y, i, data); |
| return b; |
| } |
| case DataBuffer.TYPE_DOUBLE: |
| { |
| double[] b = (double[])obj; |
| if (b == null) b = new double[numBands]; |
| for (int i=0; i < numBands; i++) |
| b[i] = getSample(x, y, i, data); |
| return b; |
| } |
| |
| default: |
| // Seems like the only sensible thing to do. |
| throw new ClassCastException(); |
| } |
| } |
| |
| public int[] getPixel(int x, int y, int[] iArray, DataBuffer data) |
| { |
| if (iArray == null) iArray = new int[numBands]; |
| for (int i=0; i < numBands; i++) |
| iArray[i] = getSample(x, y, 0, data); |
| |
| return iArray; |
| } |
| |
| /** |
| * Copy pixels from a region into an array. |
| * |
| * Copies the samples of the pixels in the rectangle starting at x, y that |
| * is w pixels wide and h scanlines high. When there is more than one band, |
| * the samples stored in order before the next pixel. This ordering isn't |
| * well specified in Sun's docs as of 1.4.2. |
| * |
| * If iArray is null, a new array is allocated, filled, and returned. |
| * |
| * @param x The x-coordinate of the pixel rectangle to store in |
| * <code>iArray</code>. |
| * @param y The y-coordinate of the pixel rectangle to store in |
| * <code>iArray</code>. |
| * @param w The width in pixels of the rectangle. |
| * @param h The height in pixels of the rectangle. |
| * @param iArray The int array to store the pixels into or null to force |
| * creation. |
| * @param data The DataBuffer that is the source of the pixel data. |
| * @return The primitive array containing the pixel data. |
| */ |
| public int[] getPixels(int x, int y, int w, int h, int[] iArray, |
| DataBuffer data) |
| { |
| if (iArray == null) iArray = new int[w*h*numBands]; |
| int outOffset = 0; |
| for (y=0; y<h; y++) |
| { |
| for (x=0; x<w;) |
| { |
| for (int b=0; b < numBands; b++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + x; |
| iArray[outOffset++] = |
| data.getElem(bankIndices[b], offset); |
| } |
| } |
| } |
| return iArray; |
| } |
| |
| public int getSample(int x, int y, int b, DataBuffer data) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + x; |
| return data.getElem(bankIndices[b], offset); |
| } |
| |
| public float getSampleFloat(int x, int y, int b, DataBuffer data) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + x; |
| return data.getElemFloat(bankIndices[b], offset); |
| } |
| |
| public double getSampleDouble(int x, int y, int b, DataBuffer data) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + x; |
| return data.getElemDouble(bankIndices[b], offset); |
| } |
| |
| /** |
| * Copy one band's samples from a region into an array. |
| * |
| * Copies from one band the samples of the pixels in the rectangle starting |
| * at x, y that is w pixels wide and h scanlines high. |
| * |
| * If iArray is null, a new array is allocated, filled, and returned. |
| * |
| * @param x The x-coordinate of the pixel rectangle to store in |
| * <code>iArray</code>. |
| * @param y The y-coordinate of the pixel rectangle to store in |
| * <code>iArray</code>. |
| * @param w The width in pixels of the rectangle. |
| * @param h The height in pixels of the rectangle. |
| * @param b The band to retrieve. |
| * @param iArray The int array to store the pixels into or null to force |
| * creation. |
| * @param data The DataBuffer that is the source of the pixel data. |
| * @return The primitive array containing the pixel data. |
| */ |
| public int[] getSamples(int x, int y, int w, int h, int b, int[] iArray, |
| DataBuffer data) |
| { |
| if (iArray == null) iArray = new int[w*h]; |
| int outOffset = 0; |
| for (y=0; y<h; y++) |
| { |
| for (x=0; x<w;) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + x; |
| iArray[outOffset++] = |
| data.getElem(bankIndices[b], offset); |
| } |
| } |
| return iArray; |
| } |
| |
| |
| /** |
| * Set the pixel at x, y to the value in the first element of the primitive |
| * array obj. |
| * |
| * @param x The x-coordinate of the data elements in <code>obj</code>. |
| * @param y The y-coordinate of the data elements in <code>obj</code>. |
| * @param obj The primitive array containing the data elements to set. |
| * @param data The DataBuffer to store the data elements into. |
| * @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer) |
| */ |
| public void setDataElements(int x, int y, Object obj, DataBuffer data) |
| { |
| int transferType = getTransferType(); |
| if (getTransferType() != data.getDataType()) |
| { |
| throw new IllegalArgumentException("transfer type ("+ |
| getTransferType()+"), "+ |
| "does not match data "+ |
| "buffer type (" + |
| data.getDataType() + |
| ")."); |
| } |
| |
| int offset = y * scanlineStride + x; |
| |
| try |
| { |
| switch (transferType) |
| { |
| case DataBuffer.TYPE_BYTE: |
| { |
| DataBufferByte out = (DataBufferByte) data; |
| byte[] in = (byte[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| case DataBuffer.TYPE_SHORT: |
| { |
| DataBufferShort out = (DataBufferShort) data; |
| short[] in = (short[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| case DataBuffer.TYPE_USHORT: |
| { |
| DataBufferUShort out = (DataBufferUShort) data; |
| short[] in = (short[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| case DataBuffer.TYPE_INT: |
| { |
| DataBufferInt out = (DataBufferInt) data; |
| int[] in = (int[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| case DataBuffer.TYPE_FLOAT: |
| { |
| DataBufferFloat out = (DataBufferFloat) data; |
| float[] in = (float[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| case DataBuffer.TYPE_DOUBLE: |
| { |
| DataBufferDouble out = (DataBufferDouble) data; |
| double[] in = (double[]) obj; |
| for (int i=0; i < numBands; i++) |
| out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[0]; |
| return; |
| } |
| default: |
| throw new ClassCastException("Unsupported data type"); |
| } |
| } |
| catch (ArrayIndexOutOfBoundsException aioobe) |
| { |
| String msg = "While writing data elements" + |
| ", x="+x+", y="+y+ |
| ", width="+width+", height="+height+ |
| ", scanlineStride="+scanlineStride+ |
| ", offset="+offset+ |
| ", data.getSize()="+data.getSize()+ |
| ", data.getOffset()="+data.getOffset()+ |
| ": " + |
| aioobe; |
| throw new ArrayIndexOutOfBoundsException(msg); |
| } |
| } |
| |
| public void setPixel(int x, int y, int[] iArray, DataBuffer data) |
| { |
| for (int b=0; b < numBands; b++) |
| data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, |
| iArray[b]); |
| } |
| |
| public void setPixels(int x, int y, int w, int h, int[] iArray, |
| DataBuffer data) |
| { |
| int inOffset = 0; |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = y * scanlineStride + (x + ww); |
| for (int b=0; b < numBands; b++) |
| data.setElem(bankIndices[b], bandOffsets[b] + offset, |
| iArray[inOffset++]); |
| } |
| y++; |
| } |
| } |
| |
| public void setSample(int x, int y, int b, int s, DataBuffer data) |
| { |
| data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s); |
| } |
| |
| public void setSample(int x, int y, int b, float s, DataBuffer data) |
| { |
| data.setElemFloat(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s); |
| } |
| |
| public void setSample(int x, int y, int b, double s, DataBuffer data) |
| { |
| data.setElemDouble(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s); |
| } |
| |
| public void setSamples(int x, int y, int w, int h, int b, int[] iArray, |
| DataBuffer data) |
| { |
| int inOffset = 0; |
| |
| switch (getTransferType()) |
| { |
| case DataBuffer.TYPE_BYTE: |
| { |
| DataBufferByte out = (DataBufferByte) data; |
| byte[] bank = out.getData(bankIndices[b]); |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + (x + ww); |
| bank[offset] = (byte)iArray[inOffset++]; |
| } |
| y++; |
| } |
| return; |
| } |
| case DataBuffer.TYPE_SHORT: |
| { |
| DataBufferShort out = (DataBufferShort) data; |
| short[] bank = out.getData(bankIndices[b]); |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + (x + ww); |
| bank[offset] = (short)iArray[inOffset++]; |
| } |
| y++; |
| } |
| return; |
| } |
| case DataBuffer.TYPE_USHORT: |
| { |
| DataBufferShort out = (DataBufferShort) data; |
| short[] bank = out.getData(bankIndices[b]); |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + (x + ww); |
| bank[offset] = (short)iArray[inOffset++]; |
| } |
| y++; |
| } |
| return; |
| } |
| case DataBuffer.TYPE_INT: |
| { |
| DataBufferInt out = (DataBufferInt) data; |
| int[] bank = out.getData(bankIndices[b]); |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + (x + ww); |
| bank[offset] = iArray[inOffset++]; |
| } |
| y++; |
| } |
| return; |
| } |
| case DataBuffer.TYPE_FLOAT: |
| case DataBuffer.TYPE_DOUBLE: |
| break; |
| default: |
| throw new ClassCastException("Unsupported data type"); |
| } |
| |
| // Default implementation probably slower for float and double |
| for (int hh = 0; hh < h; hh++) |
| { |
| for (int ww = 0; ww < w; ww++) |
| { |
| int offset = bandOffsets[b] + y * scanlineStride + (x + ww); |
| data.setElem(bankIndices[b], offset, iArray[inOffset++]); |
| } |
| y++; |
| } |
| } |
| |
| /** |
| * Creates a String with some information about this SampleModel. |
| * @return A String describing this SampleModel. |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuffer result = new StringBuffer(); |
| result.append(getClass().getName()); |
| result.append("["); |
| result.append("scanlineStride=").append(scanlineStride); |
| for(int i=0; i < bitMasks.length; i+=1) |
| { |
| result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i])); |
| } |
| |
| result.append("]"); |
| return result.toString(); |
| } |
| } |